基于虚拟仿真的拖拉机后悬挂检测装置设计与实验

doi:10.13229/j.cnki.jdxbgxb20200030

Abstract

Abstract:

In order to solve the problems of low testing efficiency， high labor intensity and danger during the tractor hydraulic suspension system text， a hitching testing device for tractor hydraulic suspension system was designed based on virtual simulation. The mechanism was composed of a hitching part and a loading part. In the hitching system， the hydraulic automatic control method was used to complete the positioning and connection of the tractor's lower pull rod. In the loading system， the lower pull rod of the tractor was loaded by adopting the hydraulic loading cylinder and lever mechanism. Meanwhile， using the lever loading method can reduce the movement displacement of the loading cylinder and avoid the excavation of the trench in the experiment site. The virtual simulation software， Adams and Workbench， was used to simulate the kinematics and mechanics of the tractor hydraulic hitch detection device. The results show that the designed hitch test device meets the mechanical requirements and the kinematic requirements without interference jamming. The tractor hydraulic hitch test device was manufactured and assembled， and the hitch and loading experiments were carried out. A loading force of 5 kN was applied to the end of the device during the loading test， and the lower pull rod of the tractor was lifted 650 mm. The results of the verification test show that the device can be used to connect the lower pull rod of the tractor accurately and quickly， and can complete the loading experiment of tractor hydraulic suspension， which meets the expected requirements. This research can provide reference for intelligent and high efficiency testing of tractor hydraulic suspension， and designing the corresponding device for testing.

Key words: agricultural engineering, tractor, hydraulic suspension, test, virtual simulation

CLC Number:

S220

Qian CONG,Jin XU,Bo-shuai MA,Xiao-chao ZHANG,Ting-kun CHEN. Design and test of tractor hydraulic suspension system testing device based on virtual simulation[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(2): 754-760.

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符号/初始条件	符号/提升过程中的变量
下拉杆长l₁/950 mm	h₂/下拉杆提升高度
挂接杆长l₂/230 mm	h₄/加载油缸下降行程
杠杆长端l₃/1500 mm	θ₁/下拉杆转动角
定点间距离l₄/2300 mm	θ₂/挂接检测机构挂接角
杠杆短端l₅/750 mm	θ₃/挂接检测机构传动角
下拉杆距地h₁/500 mm	θ₄/连接杆与空间垂直面的夹角
杠杆距地h₃/400 mm

No.	h₅	h₆	No.	h₅	h₆	No.	h₅	h₆
1	1.6	1.7	11	2.0	1.8	21	1.8	1.7
2	1.8	1.7	12	1.9	1.9	22	1.8	1.6
3	1.8	1.8	13	1.8	2.1	23	1.6	1.6
4	1.9	1.6	14	1.8	2.0	24	1.7	1.8
5	1.6	1.8	15	1.8	2.0	25	1.7	1.7
6	1.7	1.9	16	1.9	2.0	26	1.8	1.8
7	1.7	1.8	17	2.0	1.8	27	1.8	1.9
8	1.7	1.7	18	1.7	2.1	28	1.7	1.5
9	1.9	1.7	19	1.8	1.8	29	1.7	1.8
10	1.5	1.8	20	1.9	2.0	30	1.6	1.8

Design and test of tractor hydraulic suspension system testing device based on virtual simulation

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